2x2 grid, 16:9, do this for 4 famous scientists: ∂L/∂t = div( v(x,y) ⊗ L ) + src(L) – decay(L) where v(x,y) = velocity field derived from $ SUBJECT pose (action focal points as sources). Steady-state solution: streamlines of v become speed lines radiating from fists, hair, or vehicle. Luminance of L mapped to black/white/10% grey. Build poster with: A = $ SUBJECT silhouette B = deco ornaments placed along high‑curvature contours C = city towers that align to major streamline directions D = streamline plot L rendered as stepped fan rays, layered with echoes. Render as a dynamic travel poster, art deco style, strict monochrome palette.